压缩等离子体流脉冲能量密度修正方法

Correction method for pulse energy density of compression plasma flows

介绍了压缩等离子体流能量密度诊断存在的问题,基于能量的耗散走向分析及热传导计算模型,针对汽化过程对诊断带来的误差,给出了一种基于测量的质量损失,通过表面退行的有限元计算反推损失相同质量所需输入能量的能量密度修正方法,并对能量密度修正进行了评估,通过此方法得到的修正能量密度与实验结果相吻合,但要获得更准确的能量密度,还需针对屏蔽等离子体、反冲应力波等因素进行能量密度修正,或开发出更准确的能量密度诊断方法。

The problems of energy density diagnosis of compression plasma flows are introduced in this paper.Based on the energy dissipation analysis and the heat conduction calculation model,aiming at the errors caused by vaporization,an energy density correction method based on measured mass loss is proposed,and the input energies required to lose the same mass are deduced through the finite element calculation of surface receding.The energy density correction is evaluated,and the corrected energy density obtained by this method is in good agreement with the experimental results.However,to obtain more accurate energy density,it is necessary to correct the energy density for shielded plasma and recoil stress wave or develop a more accurate energy density diagnosis method.